Tooling Resin

Discussion in 'Fiberglass and Composite Boat Building' started by weldandglass, Sep 29, 2022.

  1. weldandglass
    Joined: May 2010
    Posts: 32
    Likes: 0, Points: 6, Legacy Rep: 10
    Location: Gulf Coast of Texas

    weldandglass Junior Member

    We've got three layers of 1.5 oz CSM on a 20ft mold we're making using a isopthalic tooling resin. We're going to do 12 layers total and probably only have enough resin to do 2 more layers which would be a total of five with the tooling resin. I'm having trouble sourcing more isopthalic tooling resin from my suppliers without waiting. Would the service life of the mold be shortened by using orthopthalic polyester resin for the last 7 layers?
     
  2. ondarvr
    Joined: Dec 2005
    Posts: 2,844
    Likes: 502, Points: 113, Legacy Rep: 506
    Location: Monroe WA

    ondarvr Senior Member

    No, but a typical GP resin might be better. It would normally be a DCPD ORTHO blend, which will shrink less and be stiffer than a straight Ortho.
     
  3. redreuben
    Joined: Jan 2009
    Posts: 1,946
    Likes: 199, Points: 63, Legacy Rep: 349
    Location: South Lake Western Australia

    redreuben redreuben

    Consider using coremat to bulk it up rather than so many glass layers.
     
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